Collapsible Golf Club

ABSTRACT

A collapsible golf club has three coaxially stored tapering shafts. Each of the shafts has a beveled annular ring that makes stops the extension of the shafts from the stored position to the fully extended stored position. In the fully extended position, the successive sections form interlocking or interleaved joints.

FIELD OF THE INVENTION

This invention is in the field of golf clubs, as may be used for play on any regulation golf course.

BACKGROUND

Golf has been called the great game of travel. Golfers look for a better or more challenging course, sometimes seeking to play only on courses with a world-class reputation. Traveling while packing a full set of golf clubs, requires transporting a heavy and cumbersome golf bag, within a covering or travel bag, typically along with the other entire luggage that might be expected in travel, and sometimes with a surcharge for extra baggage.

To reduce the size of the golf club package for travel, golf club sets have been made with collapsible clubs, made in sections for disassembly for travel and reassembly for play. One system is shown in U.S. Pat. No. 5,792,006, where a golf club is made in two separable systems, which can be fitted one inside the other and then fastened with screws.

One problem with collapsible golf shafts is the reliability of the shaft connections to hold the club head and shaft sections in a fixed relationship, while providing the level or quality of flexibility and shaft temper, needed for providing a “whip,” effect important in driving the golf ball and in preventing the club head from a turning axial related movement and a misaligned drive, upon impact of the club head and the ball. Further, with any degree of club head looseness or wobble, plus the torque every time a golf ball was hit any mechanical defect, which could loosen the connection, such clubs might be unsafe.

SUMMARY OF THE INVENTION

This invention relates to and an object of this invention is to provide an improved golf club, or club shaft, that can be collapsed for reducing the club length to a manageable size, for convenient non use in transportation, or the like.

A more specific object of this invention is to provide an improved golf club shaft of three or more sections with interleaved and interlocking parts that axially collapse into each other to reduce the shaft length for travel and which can be axially extended to a full length by extending the interleaved sections to the full extended length where each of the interleaved shaft sections engage in a locked or fixed relationship with the next successive axial section, in the axial direction from the handle to the club head or in reverse from the club head to the handle.

The principles of the invention, as disclosed in a preferred embodiment, are a golf club comprising three or more sections axially aligned and terminated at a first end on a club head, as would be known to those skilled in the art. The disclosed invention may be best understood with reference to a standard golf club, as is well known with a shaft tapering from the handle to the club head, in multiple steps and with each section identifiable from the next successive axial section by a narrower or wider shaft diameter, relative to whether the next section is toward the club head or to the handle, and with a step in the form of an annular step or annular bevel, integral with, and formed in, the shaft section, where the shaft diameter is expanded or reduced, in a step over the axial length of the annular bevel, to the shaft handle or to the club head, respectively. As disclosed in a preferred.

As disclosed in a preferred embodiment, each of the tapered sections at an end where its diameter is at the widest diameter has a section part representing a portion of the axial length of the section, tapering from the widest part, to an annular bevel, where the shaft diameter is narrowed over the axial length of the bevel.

As disclosed in a preferred embodiment, the opposed end of the shaft section, at its narrowest diameter, is terminated at an annular bevel at the end of the shaft where the diameter of the shaft is narrowed to its narrowest diameter.

The shaft sections, as disclosed in a preferred embodiment, are hollow. However, as would be understood by those skilled in the art, the shafts may be filled or made of a composite with an internal structure for balanced strength and flexibility, without departing from the principles of the invention, as disclosed in a preferred embodiment.

In accordance with the principles of the invention, as disclosed in a preferred embodiment, a shaft section of a narrower shaft section is interleaved and interlocked with the next successive wider shaft section, as follows.

As may be seen and as described in a preferred embodiment, each shaft section at its respective wider end, has a stepped widened interlocking shaft end part. As may be seen in a preferred embodiment, relative to the axial length of the shaft section, and in a relative movement from the narrowest end of the shaft section, the shaft width or diameter is widened by a step annular bevel, which serves to widen the shaft at a defined distance from the widest shaft end where the diameter is the largest for that respective section, and forming a receptacle in the shaft section into which the narrowest end or end with the smallest diameter, of the next shaft section, is inserted.

The interlocking axial distance for a preferred embodiment is a function of the shaft section material, resistance of the surface and the flexibility of the shaft when all of the sections are fully assembled. The interlocking or interleaved length, as may be seen in a preferred embodiment, is the length between the narrow end of the next wider shaft section and the annular bevel step axially displaced from the widest diameter part of the next narrower shaft section.

A wider section, for example the section with the golf club handle, receives as an insertion into it, the next narrow section along the axial length of the club by inserting the narrow end of the narrower section into the wider end of the next axially placed wider section in the direction toward the handle. The tapered end of the narrower section is formed to fit into the open tapered widest end of the next wider section with the two sections stopped and interlocked or interleaved, where the beveled annular ring at the end of the wider section abuts the annular step in the next narrower section

The matching tapering diameters of the shafts over the axial interlocking distance, provide a mating coextensive frictional fit which prevents the club head from turning on its axis when striking the ball and prevent wobble in the shaft when the shaft is rotated as in a drive, and when the ball is struck.

As would be apparent to those skilled in the art, the interlocking or interleaved sections, would add to the shaft wall diameter by approximated doubling the wall size, and thereby stiffening the shaft, within the interleaved or interlocked sections. As shown in a preferred embodiment, the shaft sections, within the interleaved parts may be varied in material or size to change the flexibility or stiffness of the shaft, along the interlocked or interleaved parts.

As shown for a preferred embodiment, the interlocked or interleaved shaft sections are fitted into each other and locked together at a connection sufficiently strong and rigid to act and feel functionally as a one-piece shaft.

In specifying an interlocking or interleaved axial length, for each of the interlocking or interleaved sections, the respective axial lengths of the section may be extended or reduced to accommodate the varying forces along the shaft. For example, the interleaved or interlocked length may be increased at the lower shaft connections, at the club head where the shaft is narrowest and the torque about the shaft axis produced when the ball is struck, is greatest.

In a similar manner, the length of the interlocking and interleaved sections may be reduced at the larger diameter sections, as the larger diameter section would be more resistant to deformation.

What is shown and described is a collapsible golf club shaft, comprising, at least first second and third means for shaft sections with respective progressively narrowing diameters for nesting the first means within the second means and the second means within the third means, in an extendable coaxial relationship; the first means comprising fourth means and second means comprising fifth means for forming a coextensive interleaving or interlocking joint over a coaxial length, when the first means is spatially displaced from the second means, along the axis; the second means comprising sixth means and the third means comprising seventh means for forming a coextensive interleaving or interlocking joint over a coaxial length, when the second means is spatially displaced from the third means, along the axis;

Shown is the collapsible golf club wherein the respective means for forming a coextensive joint comprised means for forming the coextensive joint with uniform mating surfaces.

Shown is the collapsible golf club wherein the fourth means and the fifth means and the sixth means and the seventh means, comprise means for stopping the extended displacement of the first and second mean, along the axis, relative to each other and to the third means, and for forming the respective s interlocking or interleaved joints.

Shown is the collapsible golf club, wherein the means for stopping the respective extended displacement of the first and second means includes a ninth means on the first means and a tenth means on the second means, whereby the displacement of the first means along the axis and within the second means is stopped by the second means.

Shown is the collapsible golf club wherein the means for stopping the respective relative displacement of the second and third means includes an eleventh means on the second means and a twelfth means on the third means, whereby the displacement of the second means along the axis and within the third means is stopped by the third means.

Shown is the collapsible golf club, wherein the means for stopping the respective displacement of the first and second means includes a ninth means on the first means and a tenth means on the second means, whereby the displacement of the first means along the axis and within the second means is stopped by the second means; and the means for stopping the respective displacement of the second and third means includes an eleventh means on the second means and a twelfth means on the third means, whereby the displacement of the second means along the axis and within the third means is stopped by the third means.

Shown is the collapsible golf club wherein the fourth means comprises means for a narrowing annular step in the first means and the fifth means comprises means for a narrowing annular step in the second means for stopping the spatial extension of the first means along the axis.

Shown is the collapsible golf club wherein the sixth means comprises means for a narrowing annular step in the second means and the seventh means comprises means for a narrowing annular step in the third means fro stopping the spatial extension of the second mean along the axis.

Shown is the collapsible golf club wherein the fourth means comprises means for a narrowing annular step in the first means and fifth means comprises means for a narrowing annular step in the second means whereby the narrowing annular step in the second means stops the spatial extension of the first means along the axis; and wherein the sixth means comprises means for a narrowing annular step in the second means and the seventh means comprises means for a narrowing annular step in the third means whereby the narrowing annular step in the third means stops the spatial extension of the second mean along the axis.

Shown is the collapsible golf club comprising, first, second, and third, shaft sections coaxially arranged in a spaced relationship; the first, second, and third shaft sections, each having a respective tapering diameter with respective wide and narrow ends; the first section comprising an annular bevel step in the tapering diameter, displaced along the axis from the wide end of the first section; the second section comprising an annular bevel step in the tapering diameter at the narrow end; and the annular bevel step in the narrow end of the second section is narrower than the annular bevel step in first section.

Shown is the collapsible golf club, wherein the tapering diameter of the first section along a length of the axis between the annular bevel step and the respective wide end, is coextensive with the tapering diameter of the second section along a length of the axis starting at the narrow end; whereby displacement of the first section along the axis and in a direction to the annular bevel step in the narrow end of the second section, brings the coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between the first and second sections.

Shown is the collapsible golf club wherein, the second section comprises an annular bevel step in the tapering diameter, displaced along the axis from the wide end of the second section; the third section comprising an annular bevel step in the tapering diameter at the narrow end of the third section; and the annular bevel step in the narrow end of the third section is narrower than the annular bevel step in first section.

Shown is the collapsible golf club wherein the tapering diameter of the second section along a length of the axis between the annular bevel step and the respective wide end, is coextensive with the tapering diameter of the third section along a length of the axis starting at the narrow end; whereby a displacement of the second section along the axis and in a direction to the annular bevel step in the narrow end of the third section, brings the coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between the second and third sections.

Shown is the collapsible golf club comprising, first, second, and third, shaft sections coaxially arranged in a spaced relationship; the first, second, and third shaft sections, each having a respective tapering diameter with respective wide and narrow ends; the first section comprising an annular bevel step in the tapering diameter, displaced along the axis from the wide end, of the first section; the second section comprising an annular bevel step in the tapering diameter at the narrow end; and the annular bevel step in the narrow end of the second section is narrower than the annular bevel step in first section; the second section comprising an annular bevel step in the tapering diameter, displaced along the axis from the wide end, of the second section; the third section comprising an annular bevel step in the tapering diameter at the narrow end; and the annular bevel step in the narrow end of the third second section is narrower than the annular bevel step in second section; and wherein the tapering diameter of the first section along a length of the axis between the annular bevel step and the respective wide end, is coextensive with the tapering diameter of the second section along a length of the axis starting at the narrow end; and whereby a displacement of the first section along the axis and in a direction to the annular bevel step in the narrow end of the second section, brings the coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between the first and second sections.

Shown is the collapsible golf club wherein the tapering diameter of the second section along a length of the axis between the annular bevel step and the respective wide end, is coextensive with the tapering diameter of the third section along a length of the axis starting at the narrow end; whereby a displacement of the second section along the axis and in a direction to the annular bevel step in the narrow end of the third section, brings the coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between the second and third sections.

Shown is the collapsible golf club wherein, the tapering diameter of the first section along a length of the axis between the annular bevel step and the respective wide end, is coextensive with the tapering diameter of the second section along a length of the axis starting at the narrow end; and whereby a displacement of the first section along the axis and in a direction to the annular bevel step in the narrow end of the second section, brings the coextensive tapering diameters into a coextensive contact and an interlocking or interleaved coaxial length between the first and second sections; and wherein the tapering diameter of the second section along a length of the axis between the annular bevel step and the respective wide end, is coextensive with the tapering diameter of the third section along a length of the axis starting at the narrow end; whereby a displacement of the second section along the axis and in a direction to the annular bevel step in the narrow end of the third section, brings the coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between the second and third sections.

Shown is the collapsible golf club wherein the coextensive contact is uniform.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows in schematic form, the collapsible golf club as used in its fully extended position and in motion toward a golf ball.

FIG. 2 shows in schematic form and in a section view, a single shaft section.

FIG. 3 shows in schematic form and in a section view, a three section collapsible golf club shaft, and with reference to the club head as the lower end and the handle as the upper end of the assembled shaft, the upper end of the lowest or narrowest section interleaved with the lower end of the middle section, with the upper end of the middle section interleaved with the lower end of the widest or upper section, and with the interleaved parts forming interlocked sections by the cooperating and coextensive tapered fits of the interleaved shaft parts.

FIG. 4 shows the collapsible golf club shaft in its collapsed state as may be used for travel.

DESCRIPTION

The principles of the invention, as shown in a preferred embodiment, comprise separate sections 13, 15, 17, interleaved and interlocked, as shown for sections 13, 15, 17, in FIG. 2, and as explained in relation to a fully assembled, extended and functioning club, as shown in FIG. 1

Each of the separate sections of the golf club 11, as shown in FIG. 1, are shown for example with reference to section 15, in FIG. 2, located for a preferred embodiment, in the middle of the shaft 12 for a shaft comprising three sections 13, 15, and 17, as shown in a preferred embodiment. As would be known to those skilled in the art, the collapsible shaft 12 is cylindrical with a tapering diameter, widening from club head 19, to handle 21. For example, as shown in FIG. 2, for shaft section 15, the shaft diameters 27, 29, and 31 progressively widen along the axis 25 a, 25 b, in axial direction 25 a to 25 b, and over the axial length 16, in the direction from the club head 19 to the club handle 25, as shown in FIG. 1.

FIG. 1 shows in full extended length and a fully functional sectioned and collapsible golf club as may be used to hit as golf ball. As shown in a preferred embodiment, a golf club generally shown by numeral 11, is made in sections, each section tapered so the sections with a respective smaller diameter may displaced coaxially into a section with a respective larger diameter, in a nested arrangement as shown in FIG. 4.

As shown in FIGS. 1, 2 and 3, a golf club shaft 12, is partially shown as made in a tapered sections, shown for example in three sections 13, 15, 17, and with a handle 21 at one end and an club head 19, at its opposed end, as known to those skilled in the art, and as shown in FIG. 1. As shown in FIG. 1, the club 11 is swung through the path and in the direction shown by arrow 23, to ball 25, as would be known to those skilled in the art.

Each of the tapered section, 13, 15, 17 has a tapering and annular beveled stepped diameter, tapering from a wider end toward the handle 21, and to narrower end toward the club head 19, and with narrowing steps defined by the annular bevels. At defined points along the axis 25 a and 25 b and along the axial length from the handle 21 to the club head 19, the passage between shaft 12, section 13, 15, and 17, is marked by steps in the form of annular bevel, at the narrow end of the sections and at a location anong the section axis displace from the wider end of the the section.

Referring to FIG. 2, with reference for example to section 15, and to FIG. 3 with reference for example to sections 13, 15, and 17, showing the sections fully displaced from the nested position shown in FIG. 4, the inventive principles are disclosed for a preferred embodiment.

As shown in FIG. 2, for section 15, two annular bevels 37 and 47, are as shown in a preferred embodiment, with respective bevel axial distances 39 and 53 and radii 41 and 49, and with each bevel 37 and 47, extending over respective axial length 39 and 53. As shown for example in FIG. 2, for section 15, a narrow end 35 terminates in an opening 33 and the wider end 55 terminates in opening 31. As would be understood by those skilled in the art, sections 13 and 15 are similarly shaped with the addition of a handle 21 on the widest section 17 as shown in FIG. 1, and a club head on the narrow end of the narrowest section 13, as shown in FIG. 1 and 3.

For a three section shaft as shown in a preferred embodiment, each of the separate sections, 13, 15, 17, have a tapering diameter and step changes in the diameter where the progressively widening or narrowing diameter of the section is stepped down or up, respectively, relative to the positioning of the section along the shaft axis 25 a, 25 b. As shown for Section 15, the end 33 of section 15, positioned in shaft 12 toward the club head 19, has a diameter 35. In accordance with the disclosed inventive principles, the diameter of the section 15 widens in a step from diameter 35 at opening 33, to diameter 27, over the annular bevel distance 39. The tapered diameter of the section 15, as shown, increases to annular step 47, where the diameter of the shaft increases from diameter 29 to diameter 30 over the annular bevel distance or length 53. The shaft section 15 is then shown as having a tapered diameter from the end of the annular bevel step 47 to the open end 55 where its diameter is widest as shown by numeral 31.

As shown in FIG. 2, the continuous taper shown between the annular bevels 37and 47, widens in diameter along the shaft axis 25 a, 25 b and in relation to the axial length 16.

As would be apparent to those skilled in the art, the size of the respective sections are arranged progressively smaller from section 17 to 15 to 13, so the sections may be nested in a coaxial arrangement, as shown in FIG. 4, with the narrowest section 13 nested within wider section 15 and with section 15 and nested section 13, nested within the next wide section 17.

The collapsible golf club 11, fully assembled and in use is as shown in FIG. 1, and collapses for travel for example, is shown in the schematics of FIGS. 3 and 4. In assembly of the golf club 11, shaft 12, as shown in FIG. 4, is assembled in sequence with the shafts coaxially positioned along the axis 25 a, 25 b, and each progressively narrower shaft, from shaft section 13, 15, 17, axially fitted into the next successive progressively wider shaft. As shown in FIG. 4, narrowest shaft section 13, is axially fitted into shaft section 15 and axial shaft section 15 is axially fitted into the widest shaft section 17. After assembly, the club head 19 and handle 21 may be added.

Although the invention is shown for three sections for a preferred embodiment, it is not limited to three sections and may be practiced with four or more sections, without departing from the disclosed inventive principles.

The separate sections, when fully assembled, for a preferred embodiment, for a three section shaft 12, is shown in FIG. 4. Each of the narrower sections 13, and 15 are shown fitted into the next progressively wider section along the axis 25 a, 25 b, as shown for 15 and 17, respectively. When assembled, as shown for a preferred embodiment, the interleaved and interlocking parts, for example as shown by numeral 75 for the interleaved or interlocking shaft sections 13 and 15 and by numeral 77 for the interlocking and interleaved shaft sections 15 and 17, are fitted or locked to each other at the annular mating surfaces at joints 76, 78, respectively, over the interlocking or interleaved length 71, 73. The tapering dimensions of the sections at respective axial locations coextensive with the joints 76, 78 are coextensive to make uniform contact between the section 13, 15 and 15, 17 at the interleaved and interlocking parts 75, 77.

In use of the golf club 11, as shown in FIG. 1, the club is swung by the golfer in the direction shown by arrow 23 toward the ball 25, creating a torque force 85 distributed along the length 16 of the shaft 11 to the center of rotation at handle 21. The torque produces a bending force along the shaft axis 25 a, 25 b, as shown for example by arrows 85. As would be understood by those skilled in the art, for the golf club to act as a stable single continuous shaft, the interlocking and interleaved parts 75 and 77, are arranged to stay locked in the their position as when set into place when the golf club is assembled, as shown in FIG. 1 and FIG. 4.

As disclosed for a preferred embodiment, the tapering diameters of the shafts 13 and 15 and of 15 and 17, at axial locations 75 and 77 and along the respective axial lengths 71 and 73, are coextensive so the contact between the adjoining surfaces at joints 76 and 78, is uniform.

The combination of material used to form the separate sections 13, 15, and 17, and the axial lengths of the interlocking and interleaved parts at joints 76 and 78, resist deformation under the distributed torque 85. As would be understood by those skilled in the art, using a standard play golf club, as a reference, and the types of metal and composite materials used, the longer the interleaved or interlocking sections, 75, 77, the more retaining force exerted by the outer or wider shaft section, for example 17, on the inner section 15 over the interleaved length 73 at joint 78, and by the outer or wider shaft section 15 over the inner section 13 over the interleaved length 71, at joint 76, the more stable the assembled shaft and more resistant to twisting and bending.

The golf club is shown in a preferred embodiment in FIG. 4 in its collapsed form, for example for traveling. As shown, each of the narrower sections 13, 15, collapses along the axis 25 a, 25 b, to fold or nest within it the next progressively wider section, 15, 17, respectively. For example as shown for a preferred embodiment, section 13 with narrowing annular bevel 81 at its narrowest end toward the club head 19, slides into and is folded into the next axially wider section 15 and in the same way section 15 is folded into section 17. The collapsed length of the club 11 can be varied by varying the length of the shaft sections 13. 15, 17 and the interlocking or interleaving axial lengths 71, 73.

In a preferred embodiment, a satisfactory interlocking or interleaving length 71, 73, along the axis 25 a, 25 b, may be varied. In a preferred embodiment, the tapered dimensions of the section 13, 15 and 17, along the axis 25 a, 25 b, form a coextensive uniform contact area for section parts 75, 77, along the respective axial length 71, 77, over the respective annular coextensive mating surfaces, at joints 76, 78, as show in FIG. 3. In extending the sections from the nested position, as shown for a preferred embodiment, in FIG. 4, to the fully extended and playing position, as shown in FIG. 3, for a preferred embodiment, the sections 13 and 15 are displaced axially in the direction shown by arrow 48, to the point where the interlocking and interleaved annular bevel step engage, as shown for part 75 and 77, in FIG. 3.

Where the interleaved or interlocked lengths 71, 73, are tightly fitted 12, the torque on the shaft, when swinging the club and striking the ball, is evenly distributed, substantially as upon a uniform shaft.

As understood by those skilled in the art, in a preferred embodiment, a coacting and mating fit of the annular mating surfaces, as shown in a preferred embodiment, the annular bevel 65 of section 13 with the annular bevel 33 of shaft 15 and annular bevel 47 of shaft 15 with the annular bevel 61 of shaft 17, contributes to the best unitary or uniform fit of the coextensive and mating surfaces over the joints 76, 78, of the of the sections when fully extended and to best performance of the fully extended club shaft 12.

In extending the shaft 12 to its fully extended position, as shown in FIG. 1, and as shown in FIG. 4, where the shaft 12 is shown in its collapsed position, the shafts 13 and 15 are pulled in the axial direction, as shown by arrow 48, in 3, from 25 b to 25 a, the annular bevel 65 in shaft 13 is stopped in its axial travel by the annular bevel 33 at the end of section 15. Similarly, shaft 15 is pulled in the same axial direction 48 to where its axial travel is stopped by its annular bevel 47 abutting annular bevel 61 at the end of shaft 17.

As may be seen in a preferred embodiment, the use of annular bevels assure accurate displacement of the shaft sections 13, 15, 17 when placing the collapsible golf club in playing position so that the mating contact at joints 76, 78, is uniform.

In a preferred embodiment, the axial length 17, 73 of the joints 76, 78, may be approximately two inches. However, this interleaved or interlocking length, shown as 71 for part 75 and 73 for part 77, may be varied with respect to shaft material and diameter, without departing from the principles of the disclosed invention.

What is shown in a preferred embodiment is a collapsible golf club in which the separate sections may be coaxially stored in a nested arrangement to reduce the size of the clubs and then extended by axially displacing the shafts away the coaxial storage position, to a point where the respective annular bevel steps engage to stop the extension of the sections and cooperate to form respective frictionally interlocked and interleaved sections joints 76, 78. 

1. A collapsible golf club shaft, comprising, a. at least first, second and and third means for shaft sections with respective progressively narrowing diameters, with said first second and third means each comprising respective wide and narrow ends for nesting said first means within said second means and said second means withing said third means, in an extended coaxial relationship; b. said first means comprising fourth means and second means comprising fifth means for forming a coextensive interleaving or interlocking joint over a coaxial length, when said first means is spatially displaced from said second means, along said axis; c. said second means comprising sixth means and said third means comprising seventh means for forming a coextensive interleaving or interlocking joint over a coaxial length, when said second means is spatially displaced from said third means, along said axis; d. said fifth mean in said second means comprising an annular bevel step in said narrow end of said second means and said said seventh means in said third means comprising an annular bevel step in said narrow end of said third means.
 2. The collapsible golf club of claim 1, wherein said respective means for forming a coextensive joint comprised means for forming said coextensive joint with uniform mating surfaces. 3-9. (canceled)
 10. A collapsible golf club, comprising, a. first, second, and third, shaft sections coaxially arranged in a spaced relationship; b. said first, second, and third shaft sections, each having a respective tapering diameter with respective wide and narrow ends; c. said first section comprising an an annular bevel step in said tapering diameter, displaced along said axis from said wide end of said first section; d. said second section comprising an annular bevel step in said tapering diameter at said narrow end; and e. said annular bevel step in said narrow end of said second section is narrower than said annular bevel step in first section.
 11. The collapsible golf club of claim 10, wherein said tapering diameter of said first section along a length of said axis between said annular bevel step and said respective wide end, is coextensive with said tapering diameter of said second section along a length of said axis starting at said narrow end; whereby displacement of said first section along said axis and in a direction to said annular bevel step in said narrow end of said second section, brings said coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between said first and second sections.
 12. The collapsible golf club, of claim 10, wherein, said second section comprises an annular bevel step in said tapering diameter, displaced along said axis from said wide end of said second section; said third section comprising an annular bevel step in said tapering diameter at said narrow end of said third section; and said annular bevel step in said narrow end of said third section is narrower than said annular bevel step in first section.
 13. The collapsible club of claim 12, wherein said tapering diameter of said second section along a length of said axis between said annular bevel step and said respective wide end, is coextensive with said tapering diameter of said third section along a length of said axis starting at said narrow end; whereby a displacement of said second section along said axis and in a direction to said annular bevel step in said narrow end of said third section, brings said coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between said second and third sections.
 14. A collapsible golf club, comprising, a. first, second, and third, shaft sections coaxially arranged in a spaced relationship; b. said first, second, and third shaft sections, each having a respective tapering diameter with respective wide and narrow ends; c. said first section comprising an an annular bevel step in said tapering diameter, displaced along said axis from said wide end, of said first section; d. said second section comprising an annular bevel step in said tapering diameter at said narrow end; and e. said annular bevel step in said narrow end of said second section is narrower than said annular bevel step in first section; f. said second section comprising an an annular bevel step in said tapering diameter, displaced along said axis from said wide end, of said second section; g. said third section comprising an annular bevel step in said tapering diameter at said narrow end; and h. said annular bevel step in said narrow end of said third second section is narrower than said annular bevel step in second section; and ‘wherein said tapering diameter of said first section along a length of said axis between said annular bevel step and said respective wide end, is coextensive with said tapering diameter of said second section along a length of said axis starting at said narrow end; and whereby a displacement of said first section along said axis and in a direction to said annular bevel step in said narrow end of said second section, brings said coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between said first and second sections.
 15. The collapsible golf club, of claim 14, wherein said tapering diameter of said second section along a length of said axis between said annular bevel step and said respective wide end, is coextensive with said tapering diameter of said third section along a length of said axis starting at said narrow end; whereby a displacement of said second section along said axis and in a direction to said annular bevel step in said narrow end of said third section, brings said coextensive tapering diameters into coextensive contact and an interlocking or interleaved coaxial length between said second and third sections.
 16. (canceled)
 17. The collapsible golf club of claim 14, wherein said coextensive contact is uniform.
 18. (canceled)
 19. The collapsible golf club of claim 1 wherein said fourth means comprises means for a narrowing annular step in said first means displaced from said wide end of said first means, whereby said fifth means narrowing annular bevel step in said second means stops said spatial extension of said first means along said axis; and wherein said sixth means comprises means for a narrowing annular bevel step in said second means displaced from said wide end of said second section whereby said seventh means narrowing annular step in said third means stops said spatial extension of said second mean along said axis. 